Looks OK. I would lose the 15mins hop addition as this will deem it - not a stout! There should be no hop flavour or aroma at all; only bitterness.
Do you know your efficiency? Assuming it is around 75%, I tapped your recipe into my beertools program and got the following:
Size: 12.0 L
Efficiency: 75.0%
Attenuation: 75.0%
Original Gravity: 1.037 (1.036 - 1.050)
Terminal Gravity: 1.009 (1.007 - 1.011)
Color: 31.84 (25.0 - 40.0)
Alcohol: 3.64% (4.0% - 5.0%)
Bitterness: 31.6 (30.0 - 45.0)
Ingredients:
1.5 kg English 2-row Pale
185 g British Crystal 55°L
185 g Roasted Barley
185 g Chocolate Malt
15 g Fuggle (4.4%) - added during boil, boiled 60 min
15 g Goldings (5.7%) - added during boil, boiled 60 min
I would also add flaked barley to your recipe. This will give your brew that stout body you're after. It will also aid head retention.
Just brewed a stout myself last night using chocolate malt like you. Today though, I wish I could turn back time as I feel that I didn't add enough roasted barley.
cheers